Should I transfer title into my name to apply for a secured loan? She was denied with me as cosigner?

My fiance recently applied for a secured loan using her paid off vehicle as collateral and I cosigned on the loan. She was denied. I have decent credit(no negatives and a car loan that I’ve paid on time for the past 20 months). Should we transfer the title into my name so I can apply for the loan myself.

Rent Back